Has anyone actually installed the Stoll-Speed Vortex Generators? They sound remarkable and I bought the complete set from AS&S. Their videos show an Express and getting 15 knots lower stall speeds!!! While losing nothing on the top end. Too good to be true? Looks like it might also give the horizontal elevator more authority over a wider range of speeds (critical issue with a CT tail?)

We installed a complete set of these vortex generators on our Express CT and saw a 12 mph decrease in stall speed (from 67 mph to 55 mph) and overall improvement in low speed handling. Well worth the loss (we think) of 1 mph in cruise speed. An excellent investment in my opinion and they still look great and are holding firm after years of use.